Refractory plug or brick for injecting gas into molten metal and its production method

A technology of molten metal and refractory materials, applied in the manufacture of converters, etc., can solve the problem of high cost, achieve the effect of preventing gas leakage and small overall size

Inactive Publication Date: 2007-01-24
VESUVIUS ADVANCED CERAMICS (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using argon, the relatively high cost must be considered

Method used

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  • Refractory plug or brick for injecting gas into molten metal and its production method
  • Refractory plug or brick for injecting gas into molten metal and its production method

Examples

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Embodiment Construction

[0041] Both figures show a plug or brick (1) for injecting gas into molten metal through a molten metal contact surface (11) comprising a body of porous refractory material (2) in addition to The molten metal contact surface (11) is substantially surrounded by a non-porous body (9). Figures 1 and 2 also show gas guiding means comprising metal or refractory conduits (4) extending through the wall (6) of the plug or brick and connected to the plenum (3). This conduit (4) is usually held in place by ordinary sealing cement or mortar (5).

[0042] Preferably, during the pressing step, a tapering portion (7) is produced towards the molten metal contact surface, as shown in FIG. 1 . During the pressing action, the tapering effect is produced by deforming the porous body into the non-porous medium at the vertical sides of the pressing die. The tapered shape also prevents the porous body (2) from being largely exfoliated by forming bonds.

[0043] According to an embodiment of the ...

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Abstract

The invention concerns a plug or brick (1) for injecting gas into molten met al through a molten metal-contacting surface (11) comprising (i) a porous refractory body (2) substantially surrounded by a substantially non-porous body (9) except at the molten metal-contacting surface (11); and (ii) gas conducting means (3, 5) for conveying the gas from a gas source to the porou s body (2). The plug or brick is characterized in that the non-porous body (11 ) is made of refractory material and in that the porous and non-porous bodies (2, 11) have been co-pressed. This plug or brick can be used to inject efficiently and reliably small bubbles into a molten metal bath.

Description

technical field [0001] The present invention relates to a refractory plug or brick for injecting gas into molten metal and to a method of manufacturing a refractory plug or brick for injecting gas into molten metal. Background technique [0002] Gases are typically injected into molten metal in vessels such as ladles, crucibles or tundishes for various purposes. For example, gas may be introduced into the bottom of the container to clear the relatively cool bottom area of ​​solidified products, for example removing them from the vicinity of the bottom casting outlet where the container has the outlet. In steelmaking, for example, the use of a fine curtain of bubbles slowly injected in the tundish will aid in the removal of impurities; impurities are attracted to the fine bubbles and rise through the melt to the surface where they are usually deposited Mouth plate covers powder or flux capture. Gases may also be introduced for purge purposes, or to homogenize the melt therm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D1/00B22D11/10C21C5/48C21C7/00C21C7/072
CPCB22D1/005B22D1/00
Inventor 克雷格·威洛比卡万·米尔沃德
Owner VESUVIUS ADVANCED CERAMICS (CHINA) CO LTD
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